本文用高速摄影(8000幅/秒)的方法,观察了7.62mm和5.56mm弹丸及直径6.35mm钢球在水中形成的瞬时空腔及其变化的特点,为研究高速小质量弹丸和破片的致伤机理提供依据。 实验结果表明,三种投射物在水中形成的弹后空腔各不相同,其差异取决于各投射物的弹道学特点。弹后空腔的形状、大小和形成的时间,对组织损伤的范围和程度有密切关系,因而具有重要的临床意义。 In this paper, the instantaneous cavities formed by 7.62mm and 5.56mm projectiles and 6.35mm diameter steel balls in water were observed by high-speed photography (8000 pieces / second). In order to study the effects of high-speed and low-mass projectiles and fragments Injury mechanism to provide the basis. Experimental results show that the three kinds of projectiles have different post-projectile cavities in water, and the difference depends on the ballistic characteristics of each projectile. Post-bomb cavity shape, size and time of formation, the extent and extent of tissue damage are closely related, and therefore has important clinical significance.